Water treating apparatus



Aug. 2i, w45 F. sl-:EALD

WATER TREATING APPARATUS Filed July 9, 1942 2 sheets-sheet 1lf/11llllnlnfllllllllll 11Min Jasph E Beba/m INVENTOR ATTORNEY Aug-21,1945. l J, F SEBALD 2,383,085

WATER TRBATING APARATUS FiledJuly 9, 1.942 2 ShetS-Sheet 2 ATTORNEYarating out as new small particles.

Patented 21;

WATER TREATING APPARATUS Joseph F. Sebd, Bloomfield, N. J., assigner `toWorthington -Pump and Machinery Corporaf tion, Harrison, N. J., acorporationo Delaware V Application July 9,'1942, Serial No. 450,263 7Claims. (Cl. 21o-16) This invention 'relates water treating appalratusand more particularly to an improved cold process apparatus forsoftening, clarifying and purifying water.

The present invention embodies theadvantages of the known fact that toadd raw water and chemicals to a slurry containing previouslyprecipitated particles improves and accelerates coagulation andpurification and accelerates the chemical and physical changes involvedin separating out the formed substances or solids. The newly formedsolids deposit by accretion upon the particles present in the' slurryrather than sep- 'I'hese 'particles are relatively stable, being notreadily subject to disintegration and of. such nature that is readilyvseparated from the j clear treated water slurry. v I

An object 'of the present invention is to provide an apparatus operatingon the principle as vanes 9 arranged so that the inlet to the mixingcirculating pump structure is at the axis of ro .tationthereo and aredischarged from the per above outlined which is constructed' andarranged to effectively treat a predetermined quantity of water in apredetermined length of time, the overall size of which apparatus ismaterially smaller than the over-all size of water treating apparatusthe same capacity per time interval'.

Another object 0f the invention is to provide in a watertreating'apparatus as specifled me# chanical means for thoroughly-mixingthe incoming raw water and chemicals and means for reclrculating a partof the slurry formed of partially treated water. chemicals andprecipitated particles which latter means is arranged with re-` spect tothev raw water and chemical mixing imeter into the vertically risingannular discharge passage I0 formed withinthe receptacle I by .25 ofapproved make now on the market having4 Figure 3 is a horizontalcross-section-taken on the line 3.-3 of Figure 1.

Referring more particularly to the drawings the improved water treatingapparatus comprises a treating receptacle or tankf I comprising anyupper storage or collection portion 2, intermediate separation orprecipitation portion 3, and a mixing and recirculation portion 4. Theraw water to be treated is delivered to the treating receptacle I fromany suitable source (not shown) through a supply piper! and enters therecep-v tacle I at the bottom thereof. Treating chem-- icalsare'introduced into the incoming raw water through the chemical inlet6."

- When the incoming raw water and chemicals enter the receptacle I theyare picked up .by a

mixing pump structure 1, including a carrier body.

8 and a plurality of relatively narrow curved the passage forming meansII of the recirculating mechanism of the water treating apparatus. ,J

The water recirculating apparatus comprises the inlet orsuction passageforming means Il in means so as to provide a thorough mixing of themixed raw water and chemicals with the recirculated slurry tohastenflocculation and the formation of precipitated particles lin a filterbed above the mixing and recirculating zones.

With these Y'and other objects in view as may appear fromtheaccompanying drawings, the invention consists'fof various'features ofconstruc. tion and combination or parts, which will be iirst describedin'connection with the accompanying drawings, showing a water treatingapparatus of the preferred form embodying the invention, and thefeatures forming the invention will'be specifically pointed out in theclaims.

In the drawings:

Figure 1 is a vertical section through proved water treating apparatus.

Figure 2 is a horizontal'cross-section taken on the line 2 -2 oi Figure1.l

I charge it into the rising discharge passage I0. f where it is mixedwith the incoming mixed raw the imthe form of an annuluslocatedconcentric of the axis of the receptacle I in the lower part ofthe separation or precipitation portion of the receptacleI l, and it isprovided with a passage having its entrance at the top and in theseparation portion or precipitation space or the receptacle I.

with` its outlet at the bottom. The e I2 .gradually decreases incross-sectional area from its inlet I4 to its outlet Il, and it forms apassage for returning slurry'constituting mixedrawwater, chemicals andprecipitation to the recirculator portion I! of the pump structure -1.

prises a plurality of curved vanes I6' rotating the slurry from thesuction passage I2 and diswa'ter and chemicals. l

The pump structure 'I is carried by a shaft I1,

4which is rotated by any suitable type of aprirne mover Il.

As notedbybre'ference to Figure 1 of the drawings, the recirculatingvanes I8 are of consider-fA The. recircuiator portion I6 o! the pumpstructure 'I com-' of'incoming raw water and chemicals which will Y bedischarged by the impeller 9 in the same' interval. Also the capacity ofthe recirculating impeller vane structure Ii is greater than thecapacity of the receptacle I, so that slurry` will be recirculatedthrough the mixing portion 4 a number of times. By varying the width orheight of the vanes I6 the rate of recirculation of slurry may be variedand also the proportion of slurry recirculated relative to the raw Waterand chemicals delivered by the pump 9 may be varied.

An agitating propeller 20 is mounted on the lshaft I1 for rotation inthe separation portion or, precipitation space of the receptacle Limmediwithdrawn therefrom, and by the same means assaos raw waterrdelivered to the treating apparatus, as well as regulating the quantityof treated water recirculated through thel apparatus. In other words,the amount of raw water supplied to the apparatus iscontrolled by and isapproximately equal to the amount of treated water the quantity oftreated water recirculated increases' in inverse ratio to the quantityof raw ately above the entrance I4 of the suction passage 15 the ock bed2|, emerging therefrom into the collection "or storage portion 2 of thereceptacle I in purified treated'condition. The purified f treated wateris withdrawn-from the collection or storage portion 2 to any desiredpoint of uset (not shown).

yIn the construction and design of water treating apparatus such as ofthe present invention,

the apparatus is designed to perform most eiliciently'with apredetermined quantity of water passing therethrough, such predeterminedquantity being based upon the maximum capacity of the apparatus.Reduction of the quantity of water supplied or the quantity of treatedwater withdrawn.. In this manner, a constant, equal volume of flow ofwater is maintained through theapparatus and maximum eiilciency ofoperation thereof is obtained.

It will be understood that the invention is not to'be limited to thespecific constructionor arrangement of parts shown, but that they may bewidely modified within the invention defined by the claims.

What is claimed is: i 1. In a water treating and purifying apparatus, areceptacle having an inlet for raw water at the center of the bottomthereof, said re-v vceptacle providing a storage space for treated waterin its top portion and a precipitation space below the storage space inwhich precipitation spaceforeign matter is precipitated from the water,an outlet for treated water from said storage space, a passage formingmember of annulose formin saidA receptacle between the inlet and theprecipitation space and located concentrically of the vertical axis ofthe receptacle with water passing through'L the treating apparatus 35tends to lower its jefilciency and affect the proper treatment of thewater. Therefore, for the purpose of maintaining operation of thetreating apparatus at its maximum efilciency, irrespective its outerperiphery spaced inwardly of. the wall of the receptacle to form anannular mixing passage discharginginto the precipitation space, ya rawwater pumping impeller .in said receptacle v and positioned to receiveat its inlet incoming of the load demand thereupon, i. e. whether the 40demand for treated water .is for full capacity or much less than fullcapacity of the apparatus,

means are provided for recirculating a part of s water from said rawwater inlet and to discharge it into said annular mixing passage, aslurry recirculation impeller in said receptacle located to receiveslurry constituting water and pre- 'cipitate passing through .saidApassage-forming collection portion reaches or rises .to apredeterminedlevel, due to reduced demand.

The treated water recirculation4 mechanismv comprises va pipe orconnection running from the Istorage or collection portion 2 and openingat its other end or outlet and into the raw water supply pipe 5 inadvance of a pump 32 whichis placed in the raw water pipeto insuredelivery of raw water to the treating apparatus in the desired quantityand at the desired\ pressure. A valve-33 is interposed in the pipe 30and'a lsecond vvalve 34 is-interposed in lthe raw water Supply pipe 5forwardly of-the connection of the' pipe 30gto the pipe 5. A float valvestructure, of 30 any approved type, as shown at 35, is provided,

.in which the float 33 moves according to the variation in level oftreatedv water in the storage or collection portion 2. The movement ofthe iloat. 36 operates a rod 31, the latter being con- 65 nected to theloperating mechanism of the valves tionately to the opening of the valve33, and when the valve -33 is closed the valve 34I will beproportionately'opened. Thus the quantity of' purified, treated waterremoved from the storage or collection portion 2 regulates the quantityof 75 Sage by Said member from said precipitation space and to dischargesaid slurry into said mixing passage for/mixing with waterdischargedthereinto by said raw water impeller, and means for operating saidimpellers.

2. In a water treatingand purifying apparatus,

a receptacle having an inlet for raw water at the center offthe' bottomthereof, said receptacle providing a storage space for treated waterinits top portion and a precipitation space below the storage space inwhich precipitation space foreign matter is precipitated from the water.Aan outlet for treated water from said storage space, a passage-formingmember ofk annulose form in said receptacle between the inlet and Atheprecipitation space and located concentrically of the vertical axis ofthe receptacle with its outer periphery spaced inwardly of the wall ofthe receptacleto form an annular mixing passage discharging into theprecipitation space, an impeller structurejin said receptacle below saidpassageforming'member, said impeller structure including a raw ywaterpumping section'having its inlet positioned to receive water from saidraw waterI inlet and its dischargelocated to discharge the water intosaidI mixing space,` said impeller structure including ka secondpumping" section having its inlet located to receive slurry,fromthepassage ,formed by said passage-forming member and its ydischargelocated to ,discharge the slurry into the mixing passage for mixing withraw water dischargedI into the mixing 'pasraw water pumping section,said,

slurry constitutingwaterand precipitate passingV from said precipitationspace through the 'passage, and means for rotating said impellerstructure.

3. In a water treating and purifying apparatus,

a receptacle having-an inlet for raw water at the center of the bottomthereof, said receptacle providing a storage space for treated water inits -Itop portion and a precipitation space below the saidreceptaclebetween vthe inlet and .the precipitation space and locatedconcentrically of the vertical axis of the receptacle with its outerperiphery spaced yinwardly of the wallof the receptacle to form anannular mixing passage dis@ charging into the precipitation space', anim peller structure in said receptacle below said ture including a rawwater pumping section having its inlet positioned to receive water fromsaid raw water inlet and its discharge located to disi charge the waterinto said mixing' space, said impeller structure including a secondpumping f section having its inlet located to receive slurry from thepassage formed by said passage-forming member and its discharge locatedto discharge the slurry into the mixing passage for mixing with rawwater discharged into the mix- `ing passage by said raw water pumpingsection,

said slurry constituting water and precipitateA passing from saidprecipitation space through the passage, means for rotating saidimpeller structure, a conduit leading from said storage space to saidraw waterinlet for passing treated water from the storage space-into thereceptacle for recirculation therethrough, valves in said inlet and saidconduit for .controlling the flow of treated water and raw water to thereceptacle.

and means actuated by variances in the level of thewater in said storageportionand operatively connected with said valves for actuating thevalves reversely for regulating the -relative amounts of raw and treatedwater delivered to said inlet.- 4

4. In a water treating and purifying apparatus. a receptacle having'aninlet for raw water at thecenter of the bottom thereof, said receptacleproviding a storage space for treated water in its top portion and aprecipitation space below the storage space in which precipitation spacefor.-

-eign matter is precipitated from the water, an

outlet for treated water from said storage space, a passagefformingmember of annulose form in said receptacle between the inlet and theprecipitation space.- and located concentrically of y the vertical axisof the recep acle with'its outer periphery spaced inwardlyo the wall ofthe receptacle to forman annular mixing passage discharging into theprecipitation space, an impeller structure in said receptacle belowsaidpassageforming member, said impeller structure includi ing arawwater pumping section having its inlet `positioned-to receive waterfrom said raw 'water inlet and itsdischarge located to discharge thewater into ,said mixing spaces said impeller ,structure including asecond pumping section having its inlet located to receive slurry fromthe passage formed by said passage-forming mem-f ber and itsdischargelocated to discharge the slurry into the. mixing passage formixing with raw water' discharged into the mixing passage by said rawwater pumping section, said slurry' constituting ,watergand precipitatepassing Vfrom said precipitation space through the passage, means forrotating saidimpeller structure; the

pumping sections of said impeller structure 5 being superposed one uponthe other, and means separating the pumping sections to prevent mixingof the slurry and raw water prior to their entrance into the mixingpassage. V5. In a water treating and purifying apparatus, i0 areceptacle having an inletfor raw water at the center of the bottomthereof, said receptacle prospacedinwardly of the wall of the receptacleto form an annular mixing passage discharging into the precipitationspace, an impeller structure in .said receptacle below: saidpassage-forming member, said impeller structure including a rawdischarge located to discharge the water into said `mixing space, saidimpeller structure including a 3u' secondpumping section having itsinlet located to receive slurry from the passage formed by saidpassage-forming 'member andv its discharge located to discharge theslurry into the mixing passage for mixing with raw water discharged intothe mixing passage by said'raw water pumping,r

section, said slurry constituting water and precipitate passing fromsaid precipitation space s through the passage', and means for rotatingsaid impeller structure, said slurry pumping section of 40 said impellerstructurehaving a capacity considwhereby slurry will be recirculat'edthrough the mixing passage a number of times.

6. In al water treating and purifying apparatus,

a receptacle having an inlet for raw water at the center of the bottomthereof, said receptacle providing a'storage space for treated waterinits top portionv and a precipitation space below the storage space lnwhich precipitation space foreign so matter isprecipitated from the'water, an outlet for treated water from said storage space, e. pas-'-sage-forming member of annulose form in said receptacle between theinlet and the precipitation space and located concentrically of thevertical i 5 5 axis ofthe receptacle with its outer periphery spacedinwardly of the wall of the receptacle to form an Vannular mixingpassage discharging into said receptacle below said passage-formingmembei'. said impeller structure including a raw water pumping sectionhavingits inlet positioned to re. ceive water` trqm Saidv raw waterinlet and its discharge located to discharge the water intosaid mixingspace, said impeller structure including a second pumping section havingits inlet located to receive slurry from the e formed by saidpassage-forming member and itsV discharge rlocated to dischargethe-slurry into the mixing pas..

sageior mixing with raw water discharged into .705 the mixing passage bysaid 'raw water pumping section, said slurry constituting water andprecipitate passing` from said precipitation space through the passage,means for rotating saidixn-4 peller structure, said vslurry lpumpingsection of 76 said impeller structure having a capacity consid- 20 axisofthe'receptacle with its outer peripheryv passage-forming member, saidimpeller strucwater p umping section having its inlet positionedto'receive water from said raw Water inlet and its erably greater thanthe capacityof the receptaclev the precipitation space, an impeller:structure erably greater than the capacity of the raw water pumpingsection of the impeller whereby a greater period. i

. '7. In a water-treating and purifying apparatus, a receptacle havingan inlet for raw water at .the center of the bottom thereof, saidreceptacle providing a storage space for treated water in its topportion and a precipitation space below the storage space in whichprecipitation space foreign matter is precipitated from the-water, anoutlet for treated waterjrom said storage space` a passage-formingmember of annulose'form in saidaeceptacle'between the inlet andythe'preclpitation space and located concentrically of the vertical axisof the receptacle *with its outer periphery spaced inwardly o f the wallofthe receptacle to form an annular mixing passage discharging into theprecipitation space, an impeller structure in said receptacle below saidpassage-forming memcharge` located to discharge the water into saidmixing space,'said impelier structure including a second pumping sectionhaving its inlet located to receive slurry from the passage formed bysaid passage-forming member and its discharge located to discharge theslurry into the mixing passage for mixing with raw Water discharged intothe mixing passage by said raw water pumping section, said slurryconstituting water and precipitate passing from said precipitation spacethrough the passage, means for rotating said impeiler structure, saidslurry pumping section of said impeller structure having a capacityconsiderably greater than the capacity of the recep- I tacle wherebyslurry will be recirculated through the mixing passage a number oftimes, a conduit leading from vsaid storage portion to said raw waterinlet for passing treated water to the inlet for recirculation throughthe receptacle, valves in said inlet and said conduit for controllingthe flow of treated water and raw water to the receptacle, and meansactuated by variances in the level of treated Water in said storagespace and operatively connected t said valves for actuating the valvesreversely for regulating the relative amounts of raw and treated waterdelivered to the receptacle.

` JOSEPH F. SEBALD.-

